CN102438312B - Mobile communication system and CSI-RS (channel state indication reference signal) configuring method thereof - Google Patents
Mobile communication system and CSI-RS (channel state indication reference signal) configuring method thereof Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W48/00—Access restriction; Network selection; Access point selection
- H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0636—Feedback format
- H04B7/0639—Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
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Abstract
The invention discloses a mobile communication system and a CSI-RS (channel state indication reference signal) configuring method thereof. In the mobile communication system, a base station informs user equipment of CSI-RS configuration information, wherein the CSI-RS configuration information comprises period and subframe offset as well as CSI-RS position information, the CSI-RS position information is informed to the user equipment by utilizing a recessive mode of calculating position information according to cell identification and antenna information, or a dominant mode of carrying position information parameters through signaling or a combined mode of the recessive mode and the dominant mode, and the position information parameters can be an intragroup index, or an intergroup index, or a position information index, or the position information index and antenna port information. According to the invention, the base station informs the user equipment of the CSI-RS position information, so that the user equipment can accurately acquire CSI-RS information.
Description
Technical field
The present invention relates to communication technical field, particularly relate to the collocation method of a kind of mobile communication system under Long Term Evolution AS (Long term evolution advanced system, be called for short LTE-Advanced) and channel status instruction reference signal CSI-RS thereof.
Background technology
In long evolving system LTE (Long Term Evolution) R10 version, in order to the throughput of the availability of frequency spectrum and each user equipment (UE) (User Equipment) that improve the average availability of frequency spectrum in community and cell edge further, respectively define two kinds of reference signals: channel status instruction reference signal CSI-RS (Channel State Indication-Reference Signal) and demodulated reference signal DMRS (De-Modulation Reference Signal), wherein: channel status instruction reference signal CSI-RS is used for the measurement of channel, by can calculate PMI (the Precoding Matrix Indicator that user equipment (UE) needs to feed back to base station (eNB) to the measurement of CSI-RS, pre-coding matrix index), CQI (Channel Quality Indicator, channel quality information indicates) and RI (Rank Indicator, order indicates).
It is all sparse that the 3GPP LTE-A RAN1 61bis meeting of third generation partner program had defined CSI-RS in the past in the distribution of time domain and frequency domain, and the pilot density only comprising each antenna port in a Serving cell CSI-RS in a Resource Block RB (Resource Block) will be ensured, and in time domain using the multiple of 5ms as the cycle of CSI-RS.Respectively to the pattern under FDD (frequency division multiplexing) system and TDD (time division multiplexing) system definition normal cyclic prefix (Normal CP) and extended cyclic prefix (Extended CP) in the 3GPP LTE-A RAN1 61bis meeting.As shown in Figure 1, show the pattern of CSI-RS Normal CP in FDD system and TDD system, Fig. 2 is the pattern of CSI-RS Extended CP in FDD system and TDD system.
The emphasis discussed in N/A will be the configuration relevant issues of CSI-RS.How to configure CSI-RS, make the UE in community obtain CSI-RS relevant configuration information exactly, thus channel is measured accurately and reported become the technical issues that need to address.
Summary of the invention
Technical problem to be solved by this invention is, provides the collocation method of a kind of mobile communication system and channel status instruction reference signal CSI-RS thereof.
In order to solve the problem, the present invention proposes a kind of collocation method of channel status instruction reference signal of mobile communication system, comprising:
Channel status is indicated the configuration information notifying user equipment of reference signal by base station, and the configuration information of described channel status instruction reference signal comprises cycle and sub-frame offset, also comprises the positional information of channel status instruction reference signal;
Wherein, the positional information of described channel status instruction reference signal adopts the recessive manner according to cell ID and aerial information DR position information, or adopt signaling to carry the dominant mode of location information parameter, or the mode adopting described recessive manner and dominant mode to combine inform subscriber equipment.
When the positional information of described channel status instruction reference signal adopts and informs subscriber equipment according to the recessive manner of cell ID and aerial information DR position information, subscriber equipment is at the physical label that afterwards obtain community synchronous with Serving cell, the aerial information of community is obtained after receiving the SIBx information of community, wherein, x=1 or 2, again according to the physical label of described community and the aerial information of community, subscriber equipment obtains index and the interior index of group between the group in described positional information according to the following equation:
Wherein, InterGroupIndex is index between group, and IntraGroupIndex is index in group,
for the physical label of community, AntNum is the number of antennas of community, and MultiFactor is the minimum multiplexing factor of community; Between described group, index is the index information of each resource group distributing to channel status instruction reference signal, is used to indicate each resource group; In described group, index is the index information of each Resource Block in each resource group, is used to indicate each Resource Block, the corresponding resource element RE couple of each Resource Block described.
When the dominant mode that described channel status indicates the positional information of reference signal to adopt signaling to carry location information parameter informs subscriber equipment, entrained location information parameter is index and the interior index of group between group; Between described group, index is the index information of each resource group distributing to channel status instruction reference signal, is used to indicate each resource group; In described group, index is the index information of each Resource Block in each resource group, is used to indicate each Resource Block, the corresponding resource element RE couple of each Resource Block described.Maximum group of number of described resource group is corresponding with maximum multiplexing factor during 8 antenna, wherein: the maximum group number corresponding for multiplexing factor maximum under frequency division duplex system normal cyclic prefix is 5; The maximum group number corresponding for multiplexing factor maximum under frequency division duplex system extended cyclic prefix is 4; The maximum group number corresponding for multiplexing factor maximum under tdd systems normal cyclic prefix is 8; The maximum group number corresponding for multiplexing factor maximum under tdd systems extended cyclic prefix is 7.In described group, index is undertaken notifying by the aerial information of channel status instruction reference signal and the combined coding of channel status instruction reference signal port 0 position.
When the positional information of described channel status instruction reference signal adopts the mode of described recessive manner and dominant mode combination to inform subscriber equipment, base station adopts signaling to carry the dominant mode of location information parameter, and index between group is sent to subscriber equipment; Subscriber equipment, according to the aerial information obtaining community when the mark obtaining community afterwards synchronous with Serving cell and the SIBx information receiving community, calculates index, wherein x=1 or 2 in acquisition group; Between described group, index is the index information of each resource group distributing to channel status instruction reference signal, is used to indicate each resource group; In described group, index is the index information of each Resource Block in each resource group, is used to indicate each Resource Block, the corresponding resource element RE couple of each Resource Block described.
When the dominant mode that described channel status indicates the positional information of reference signal to adopt signaling to carry location information parameter informs subscriber equipment, entrained location information parameter is positional information index, positional information index is sent to subscriber equipment by base station, and described subscriber equipment is undertaken tabling look-up by positional information index and obtains corresponding positional information; The position table containing positional information and positional information index preserved by described base station and subscriber equipment.The described position table containing positional information and positional information index adopts the position of the combined coding of channel status instruction reference signal CSI-RS antenna port number and CSI-RS first port location information to show.
When the dominant mode that described channel status indicates the positional information of reference signal to adopt signaling to carry location information parameter informs subscriber equipment, entrained location information parameter is positional information index, positional information index is sent to subscriber equipment by base station, and described subscriber equipment carries out tabling look-up according to positional information index and antenna port number and obtains corresponding positional information; The position table containing antenna port number, positional information and positional information index preserved by described base station and subscriber equipment.The described position table containing antenna port number, positional information and positional information index adopts the positional information of channel status instruction reference signal CSI-RS first antenna port and the position table of CSI-RS antenna port number absolute coding.
The present invention also provides a kind of mobile communication system, comprises base station and subscriber equipment, wherein,
Described base station, for channel status being indicated the configuration information notifying user equipment of reference signal, the configuration information of described channel status instruction reference signal comprises cycle and sub-frame offset, also comprises the positional information of channel status instruction reference signal; Wherein, the positional information of described channel status instruction reference signal adopts the recessive manner according to cell ID and aerial information DR position information, or adopt signaling to carry the dominant mode of location information parameter, or the mode adopting described recessive manner and dominant mode to combine inform subscriber equipment;
Described subscriber equipment, sends mode corresponding to positional information mode with base station and receives for adopting the positional information that described channel status indicates reference signal.
When the positional information of described channel status instruction reference signal adopts and informs to subscriber equipment according to the recessive manner of cell ID and aerial information DR position information by described base station, described subscriber equipment is at the physical label that afterwards obtain community synchronous with Serving cell, the aerial information of community is obtained when receiving the SIBx information of community, wherein, x=1 or 2, according to the physical label of described community and the aerial information of community, subscriber equipment obtains index and the interior index of group between the group in described positional information according to the following equation:
Wherein, InterGroupIndex is index between group, and IntraGroupIndex is index in group,
for the physical label of community, AntNum is the number of antennas of community, and MultiFactor is the minimum multiplexing factor of community.
The position table containing positional information and positional information index preserved by described base station and subscriber equipment; When the dominant mode that the positional information of described channel status instruction reference signal adopts signaling to carry location information parameter is informed to subscriber equipment by described base station, entrained location information parameter is positional information index, positional information index is sent to subscriber equipment by base station, and described subscriber equipment is undertaken tabling look-up by positional information index and obtains corresponding positional information.
The described position table containing positional information and positional information index adopts the position of the combined coding of channel status instruction reference signal CSI-RS antenna port number and CSI-RS first port location information to show, or adopt the positional information of channel status instruction reference signal CSI-RS first antenna port and the position table of CSI-RS antenna port number absolute coding.
When the dominant mode that the positional information of described channel status instruction reference signal adopts signaling to carry location information parameter is informed to subscriber equipment by described base station, entrained location information parameter is index and the interior index of group between group.
When the mode that the positional information of described channel status instruction reference signal adopts described recessive manner and dominant mode to combine is informed to subscriber equipment by described base station, base station adopts signaling to carry the dominant mode of location information parameter, and index between group is sent to subscriber equipment; Described subscriber equipment, according to the aerial information obtaining community when the mark obtaining community afterwards synchronous with Serving cell and the SIBx information receiving community, calculates index in acquisition group, wherein, and x=1 or 2.
The collocation method of mobile communication system of the present invention and channel status instruction reference signal CSI-RS thereof, adopt the recessive manner according to cell ID and aerial information DR position information, or adopt signaling to carry the dominant mode of location information parameter, or the mode adopting described recessive manner and dominant mode to combine, indicates the location information notification of reference signal to subscriber equipment by channel status.The positional information of UE CSI-RS is informed in base station in the manner described above, thus UE can Obtaining Accurate CSI-RS information, the CSI-RS on these positions is utilized to calculate PMI and CQI feedback utilizes these feedacks to dispatch to eNB, eNB, adaptive coding and modulating and precoding.
Accompanying drawing explanation
Fig. 1 is the pattern of CSI-RS Normal CP in FDD system and TDD system;
Fig. 2 is the pattern of CSI-RS Extended CP in FDD system and TDD system;
Fig. 3 be between employing group index and group in indexed mode time, the grouping pattern of CSI-RS Normal CP in FDD system and TDD system;
Fig. 4 be between employing group index and group in indexed mode time, the grouping pattern of CSI-RS Extended CP in FDD system and TDD system;
When Fig. 5 is the concordance list adopting number of antennas and positional information combined coding, CSI-RS is Normal CP CSI-RS Position Number pattern in FDD system and TDD system;
When Fig. 6 is the concordance list adopting number of antennas and positional information combined coding, CSI-RS is Extended CP CSI-RS Position Number pattern in FDD system and TDD system;
When Fig. 7 is the concordance list adopting number of antennas and positional information absolute coding, CSI-RS is Normal CP CSI-RS Position Number pattern in FDD system and TDD system;
When Fig. 8 is the concordance list adopting number of antennas and positional information absolute coding, CSI-RS is Extended CP CSI-RS Position Number pattern in FDD system and TDD system;
Plot planning example when Fig. 9 is recessive advice method.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, the present invention is described in further detail.
When carrying out channel status instruction reference signal CSI-RS configuration, it is synchronous that user equipment (UE) obtains with Serving cell by downlink reception, then UE receives the MIB system information that Serving cell sends, described MIB system information, according to the cycle of 40ms, the 2nd time slot of each radio frames sends; UE also needs to receive SIB1 information to obtain the relevant schedule information of other SIB information after receiving MIB system information, and the described SIB1 information of Serving cell sent in each even number radio frames He in the 6th subframe according to the cycle of 80ms; UE just can determine transmission cycle and the sub-frame offset of SIB2 after receiving SIB1 information, thus next SIB2 information is received, obtain the configuration information of the CSI-RS of Serving cell, or directly in SIB1, obtain the CSI-RS configuration information of Serving cell.At least comprise the cycle of CSI-RS in the configuration information of described CSI-RS, sub-frame offset, if adopt the mode manifested to notify the positional information of CSI-RS, also need the positional information comprising CSI-RS.When synchronous with Serving cell, UE can obtain cell ID, can obtain the aerial information of Serving cell after receiving SIB2.
In layoutprocedure, channel status is indicated the configuration information notifying user equipment of reference signal by base station, and the configuration information of described channel status instruction reference signal comprises cycle and sub-frame offset, also comprises the positional information of channel status instruction reference signal;
Wherein, the positional information of described channel status instruction reference signal adopts the recessive manner according to cell ID and aerial information DR position information, or adopt signaling to carry the dominant mode of location information parameter, or the mode adopting described recessive manner and dominant mode to combine inform subscriber equipment.
Below in conjunction with specific embodiment, introduce the specific implementation under various configuration mode respectively.
Embodiment one: adopt recessive manner by the location information notification user equipment (UE) of CSI-RS.
Distribute to CSI-RS position in pattern according to Fig. 1 and Fig. 2, available resources have been divided into some resource groups, have divided again resource sub-block in each resource group.Thus, a kind of mode configuring CSI-RS positional information can be obtained, can adopt index between resource group group, the position of corresponding CSI-RS is represented to the mode of the interior index of resource sub-block group in group, namely know the resource group can locating ownership between group after index, know that in group, index can in resource group inner position to corresponding resource sub-block.
User equipment (UE) is carrying out the synchronous physical I D that later just can obtain community with Serving cell, and then UE just can obtain the aerial information of community when receiving the SIBx of community (wherein, x=1 or 2) information.According to the physical I D of community and the aerial information of community, user equipment (UE) according to the following equation (1) can obtain index and the interior index of group between group:
(formula 1)
Wherein, InterGroupIndex is index between group, and IntraGroupIndex is index in group,
for the physical I D of community, AntNum are the number of antennas of community, MultiFactor is the minimum multiplexing factor of community.In index and group after index, the positional information of community CSI-RS can be obtained between acquisition group.The minimum multiplexing factor MultiFactor of community, can be regarded as maximum multiplexing factor during 8 antenna configuration here.
For described CSI-RS positional information group between index InterGroupIndex, the distribution of group number can be carried out according to maximum multiplexing factor during 8 antenna configuration, namely when 8 antenna configuration altogether can the number of position of CSI-RS, the resource group number that this maximum multiplexing factor is namely corresponding available.In described group, the number of index IntraGroupIndex is determined by available resource elements RE logarithm altogether in the available position of 8 antennas.
Such as, in FDD system, if community adopts Normal CP, then: during 2 antenna configuration, physical I D is 0 ~ 20, and between their group, index is respectively to utilize formula 1 to draw:
in group, index is respectively
during 4 antenna configuration, physical I D is 0 ~ 20, and between their group, index is respectively to utilize formula 1 to draw:
in group, index is respectively
during 8 antenna configuration, physical I D is 0 ~ 20, and between their group, index is respectively to utilize formula 1 to draw:
in group, index is respectively
The position of the CSI-RS of community just can be obtained in index and group after index between UE acquisition group, thus utilize the CSI-RS on these positions to calculate PMI and CQI feedback to base station eNB, the PMI that base station eNB utilizes these to feed back and CQI information are dispatched, adaptive coding and modulating and precoding.
So UE can without SIBx (wherein, x=1 or 2) in special CSI-RS position signaling just can obtain the CSI-RS positional information of community, if certainly adopt recessive advice method, also there is no need to comprise CSI-RS positional information in CSI-RS configuration information so in SIBx (wherein, x=1 or 2).
Wherein, whole CSI-RS pattern carries out dividing according to the mode between group and in group.In relevant group, between index and group, the distribution pattern of index can see accompanying drawing 3 and accompanying drawing 4, in figure, the part of Digital ID is CSI-RS available resources, the Resource Block of different background depth represents different groups, between group, the sequence of index can according to from top to bottom, order from left to right, index in the digitized representation group in color lump.Concrete schematic diagram of arranging net can with reference to accompanying drawing 9.
UE in index and group after index, finds corresponding resource, can obtain the CSI-RS position of correspondence, thus accurately can receive CSI-RS information between acquisition group from Fig. 3 and Fig. 4.
Embodiment two: the positional information notifying UE CSI-RS by adding dominant signaling in CSI-RS configuration information.
Positional information between the group that this dominant signaling comprises CSI-RS.
Carrying out group technology to the resource of CSI-RS has a lot, can with reference to the group technology of accompanying drawing 3 and accompanying drawing 4.CSI-RS positional information in the configuration information of the CSI-RS wherein in SIBx (wherein, x=1 or 2) can only include information between group, i.e. index between group.Different according to the number of the minimum multiplexing factor group of each pattern, be 5 for organizing number under FDD system Normal CP, be 4 for organizing number under FDD system ExtendedCP, being 8 for organizing number under TDD system Normal CP, is 7 for organizing number under TDD system ExtendedCP.Between the group in CSI-RS positional information, information maximization takies 3 bits.
Then, group internal information can be notified by recessive mode, and the mode of this recessiveness requires that UE knows ID and the antenna configuration number of community.UE is known the ID of community by down-going synchronous process and is known the antenna configuration number of community by receiving SIBx (wherein, x=1 or 2), then subscriber equipment calculated community by the formula 1 in embodiment 1 group in index IntraGroupIndex.
User equipment (UE) is after by index in recessive manner acquisition group, in combination with dominant mode from SIBx (wherein, x=1 or 2) between the group that obtains index just can obtain the position of the CSI-RS of community, thus utilize the CSI-RS information on these positions to calculate PMI and CQI feedback to base station eNB, base station eNB utilizes these feedacks to dispatch, adaptive coding and modulating and precoding.
Embodiment three: the positional information notifying UE CSI-RS by adding dominant signaling in CSI-RS configuration information.
Positional information in positional information and group between the group that this dominant signaling comprises CSI-RS.Group technology has a lot, can the group technology of accompanying drawing 3 and accompanying drawing 4 in reference example 1.CSI-RS positional information in the configuration information of the CSI-RS wherein in SIBx (wherein, x=1 or 2) comprises information and group internal information between group, namely comprises index and the interior index of group between group.
Different according to the number of the minimum multiplexing factor group of each pattern, be 5 for the group number under FDD system Normal CP, be 4 for the group number under FDD system Extended CP, being 8 for the group number under TDD system Normal CP, is 7 for the group number under TDD system Extended CP.Between CSI-RS group, positional information is maximum takies 3 bits.
To each resource group, can be divided into 4 parts in group, wherein each part comprises a resource element RE couple.In group, positional information comprises 3 bits, the corresponding table index of this 3 bit information, and this table can shown in reference table 2.According to table 2, eNB only needs to notify the index in a table, and UE just can according to index in search index to the CSI-RS group of related cell.
Location index in the group of table 2CSI-RS
UE is by the table index of index in acquisition group, and index in the group that just can obtain CSI-RS by tabling look-up, just can obtain the position of the CSI-RS of community in conjunction with index between the group in SIBx (wherein, x=1 or 2).Thus utilize the CSI-RS on these positions to calculate PMI and CQI feedback utilizes these feedacks to dispatch to eNB, eNB, adaptive coding and modulating and precoding.
Embodiment four: the positional information notifying UE CSI-RS by adding dominant signaling in CSI-RS configuration information.
In this dominant signaling, comprise the positional information index of CSI-RS.
ENB and UE end can prestore a greatly table (this big table can reference table 3 shown in) respectively, and table comprises positional information index, antenna port number, and positional information.ENB can by informing the positional information index in UE mono-table according to table 3, UE just can find the position of the CSI-RS of related cell according to search index table 3.
The location index of table 3CSI-RS
| I CSI-RS | AntPortNum | Location | I CSI-RS | AntPortNum | Location |
| 0 | 8 | 0 | 32 | 2 | 8 |
| 1 | 8 | 4 | 33 | 2 | 9 |
| 2 | 8 | 8 | 34 | 2 | 10 |
| 3 | 8 | 12 | 35 | 2 | 11 |
| 4 | 8 | 16 | 36 | 2 | 12 |
| 5 | 8 | 20 | 37 | 2 | 13 |
| 6 | 8 | 24 | 38 | 2 | 14 |
| 7 | 8 | 28 | 39 | 2 | 15 |
| 8 | 4 | 0 | 40 | 2 | 16 |
| 9 | 4 | 2 | 41 | 2 | 17 |
| 10 | 4 | 4 | 42 | 2 | 18 |
| 11 | 4 | 6 | 43 | 2 | 19 |
| 12 | 4 | 8 | 44 | 2 | 20 |
| 13 | 4 | 10 | 45 | 2 | 21 |
| 14 | 4 | 12 | 46 | 2 | 22 |
| 15 | 4 | 14 | 47 | 2 | 23 |
| 16 | 4 | 16 | 48 | 2 | 24 |
| 17 | 4 | 18 | 49 | 2 | 25 |
| 18 | 4 | 20 | 50 | 2 | 26 |
| 19 | 4 | 22 | 51 | 2 | 27 |
| 20 | 4 | 24 | 52 | 2 | 28 |
| 21 | 4 | 26 | 53 | 2 | 29 |
| 22 | 4 | 28 | 54 | 2 | 30 |
| 23 | 4 | 30 | 55 | 2 | 31 |
| 24 | 2 | 0 | 56 | reserved | reserved |
| 25 | 2 | 1 | 57 | reserved | reserved |
| 26 | 2 | 2 | 58 | reserved | reserved |
| 27 | 2 | 3 | 59 | reserved | reserved |
| 28 | 2 | 4 | 60 | reserved | reserved |
| 29 | 2 | 5 | 61 | reserved | reserved |
| 30 | 2 | 6 | 62 | reserved | reserved |
| 31 | 2 | 7 | 63 | reserved | reserved |
Wherein, I
cSI-RSfor the positional information index of CSI-RS, AntPortNum is the antenna port number of community, and Location is the position of community in Resource Block.
Utilize table 3, eNB just can inform the positional information of UE CSI-RS by notice UE table index, thus UE utilizes the CSI-RS on these positions to calculate PMI and CQI feedback utilizes these feedacks to dispatch to eNB, eNB, adaptive coding and modulating and precoding.
Also can adopt the mode of directly notice more specific location information, the CSI-RS positional information index that CSI-RS antenna port number and CSI-RS first antenna port position carry out under combined coding is informed to UE.As shown in Figure 5, CSI-RS CSI-RS Position Number pattern under Normal CP in FDD system and TDD system is given, the location index of the digitized representation CSI-RS in color lump.Its concrete CSI-RS location index is as shown in table 4.
Table 4 when Normal CP configures, the location index of CSI-RS
In table 4, frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD.CSI ConfigurationIndex refers to the location index of CSI-RS in table, and in parameter (k ', l '), k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe when value is 1.In table 4, location index 0 ~ 19,35 ~ 46 correspond to 2 antenna configurations, 20 ~ 29, and 47 ~ 52 correspond to 4 antenna configurations, 30 ~ 34, and 53 ~ 55 correspond to 8 antenna configurations.
After UE receives the location index that base station issues, from table 4, find corresponding index, obtain (k ', l ') and n
sthe value of mod2, can according to the frequency domain position index k ' of first of a correspondence CSI-RS port, the index l ' of the initial OFDM symbol of first CSI-RS port, and slot values (0 or 1) navigates to resource location and the CSI-RS antenna port information of number of this CSI-RS antenna port one correspondence, thus utilize the positional information of other CSI-RS antenna ports of this community of these information acquisitions, realize accurately receiving CSI-RS, thus carry out the measurement of down channel.
As shown in Figure 6, CSI-RS Extended CPCSI-RS Position Number pattern in FDD system and TDD system is shown, the location index of the digitized representation CSI-RS in color lump.Its concrete CSI-RS location index is as shown in table 5.
Table 5 when Extended CP configures, the location index of CSI-RS
Wherein, 0 ~ 15,28 ~ 39 is 2 antenna configurations, and 16 ~ 23,40 ~ 45 is 4 antenna configurations, and 24 ~ 27,46 ~ 48 is 8 antenna configurations.
In table 5, frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD.In parameter (k ', l '), k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe when value is 1.
After UE receives the location index that base station issues, from table 5, find corresponding index, obtain (k ', l ') and n
sthe value of mod2, can according to the frequency domain position index k ' of first of a correspondence CSI-RS port, the index l ' of the initial OFDM symbol of first CSI-RS port, and slot values (0 or 1) navigates to resource location and the CSI-RS antenna port information of number of this CSI-RS antenna port one correspondence, thus utilize the positional information of other CSI-RS antenna ports of this community of these information acquisitions, realize accurately receiving CSI-RS, thus carry out the measurement of down channel.
Above-mentioned table 4 and table 5 are CSI-RS positional information concordance lists of the combined coding of CSI-RS antenna port number and CSI-RS first port location information.
Embodiment five: the positional information notifying UE CSI-RS by adding dominant signaling in CSI-RS configuration information.
This dominant signaling comprises positional information index and the CSI-RS antenna port number of CSI-RS.ENB and UE end can prestore a greatly table (this big table can reference table 6 and table 7 shown in) respectively.
ENB can by according to table 6 inform UE mono-table in index and CSI-RS antenna port number, UE just can find the position of the CSI-RS of related cell according to search index table 6.
Table 6 when Normal CP configures, the location index of CSI-RS
Frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD.Wherein, I
cSI-RSfor the location information notification index of CSI-RS, in parameter (k ', l '), k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe when value is 1.In CSI-RS configuration information 2,4,8 represents corresponding antenna port number respectively.
Then, after by notice UE table index and antenna port number, eNB just can inform that the positional information of UE CSI-RS, UE receive the location index that base station issues, from table 6, corresponding index and antenna port number is found, acquisition (k ', l ') and n
sthe value of mod2, can according to the frequency domain position index k ' of first of a correspondence CSI-RS port, the index l ' of the initial OFDM symbol of first CSI-RS port, and slot values (0 or 1), utilize the positional information of other CSI-RS antenna ports of this community of these information acquisitions, realize accurately receiving CSI-RS.Thus UE utilizes the CSI-RS on these positions to calculate PMI and CQI feedback utilizes these feedacks to dispatch to eNB, eNB, adaptive coding and modulating and precoding.
As shown in Figure 7 and Figure 8, CSI-RS CSI-RS Position Number pattern under Normal CP and Extended CP in FDD system and TDD system is given, the location index of the digitized representation CSI-RS in color lump.Its concrete CSI-RS location index as table 6 (Normal CP), shown in table 7 (Extended CP).Table 6 and table 7 are the concordance lists under CSI-RS antenna port number and CSI-RS positional information absolute coding.
Table 7 when Extended CP configures, the location index of CSI-RS
Wherein, frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD, and k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe when value is 1.In CSI-RS configuration information 2,4,8 represents corresponding antenna port number respectively.
Embodiment six: the positional information notifying UE CSI-RS by adding dominant signaling in CSI-RS configuration information.
In this dominant signaling: the index and the CSI-RS antenna port number that comprise the positional information of CSI-RS.ENB and UE end can prestore a greatly table (this big table can reference table 8 and table 9 shown in) respectively.ENB can by according to table 8 inform UE mono-table in index and CSI-RS antenna port number, UE just can find the position of the CSI-RS of related cell according to search index table 8.
Table 8 when Normal CP configures, the location index of CSI-RS
Frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD.Wherein, I
cSI-RSfor the location information notification index of CSI-RS, in parameter (k ', l '), k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe when value is 1.In CSI-RS configuration information 2,4,8 represents corresponding antenna port number respectively.
Then eNB just can inform the positional information of UE CSI-RS by notice UE table index and antenna port number, after UE receives the location index and antenna port number that base station issues, corresponding index and antenna port number is found from table 6, obtain (k ', l ') and n
sthe value of mod2, can according to the frequency domain position index k ' of first of a correspondence CSI-RS port, the index l ' of the initial OFDM symbol of first CSI-RS port, and slot values (0 or 1), utilize the positional information of other CSI-RS antenna ports of this community of these information acquisitions, realize accurately receiving CSI-RS.UE utilizes the CSI-RS on these positions to calculate PMI and CQI feedback utilizes these feedacks to dispatch to eNB, eNB, adaptive coding and modulating and precoding.
As shown in Figure 5, CSI-RS CSI-RS Position Number pattern under Normal CP in FDD system and TDD system is given, the location index of the digitized representation CSI-RS in color lump.Its concrete CSI-RS location index is as shown in table 8.
As shown in Figure 6, CSI-RS CSI-RS Position Number pattern under Extended CP in FDD system and TDD system is given, the location index of the digitized representation CSI-RS in color lump.Its concrete CSI-RS location index is as shown in table 9.
Table 8 and table 9 are the concordance lists under CSI-RS antenna port number and CSI-RS first antenna port positional information absolute coding.
Table 9 when Extended CP configures, the location index of CSI-RS
Wherein, frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD, and k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe when value is 1.In CSI-RS configuration information 2,4,8 represents corresponding antenna port number respectively.
The foregoing is only embodiments of the invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within right of the present invention.
Claims (16)
1. a collocation method for the channel status instruction reference signal of mobile communication system, comprising:
Channel status is indicated the configuration information notifying user equipment of reference signal by base station, and the configuration information of described channel status instruction reference signal comprises cycle and sub-frame offset, also comprises the positional information of channel status instruction reference signal;
Wherein, the positional information of described channel status instruction reference signal adopts the recessive manner according to cell ID and aerial information DR position information, or adopt signaling to carry the dominant mode of location information parameter, or the mode adopting described recessive manner and dominant mode to combine inform subscriber equipment;
Described location information parameter can indicate one of in such a way:
1) location information parameter comprises index and the interior index of group between group;
Between described group, index is the index information of each resource group distributing to channel status instruction reference signal, is used to indicate each resource group;
The minimum multiplexing factor of the maximum Zu Shuowei community of resource group;
Or maximum group of number of resource group is corresponding with maximum multiplexing factor during 8 antenna, wherein:
The maximum group number corresponding for multiplexing factor maximum under frequency division duplex system normal cyclic prefix is 5;
The maximum group number corresponding for multiplexing factor maximum under frequency division duplex system extended cyclic prefix is 4;
The maximum group number corresponding for multiplexing factor maximum under tdd systems normal cyclic prefix is 8;
The maximum group number corresponding for multiplexing factor maximum under tdd systems extended cyclic prefix is 7;
In described group, index is the index information of each Resource Block in each resource group, is used to indicate each Resource Block, the corresponding resource element RE couple of each Resource Block described;
2) location information parameter entrained by is positional information index, and positional information index is sent to subscriber equipment by base station, and described subscriber equipment is undertaken tabling look-up by positional information index and obtains corresponding positional information; The position table containing positional information and positional information index preserved by described base station and subscriber equipment;
The described position table containing positional information and positional information index is as shown in the table:
Wherein, I
cSI-RSfor the positional information index of CSI-RS, AntPortNum is the antenna port number of community, and Location is the position of community in Resource Block;
3) the described position table containing positional information and positional information index is the position table adopting channel status to indicate the combined coding of reference signal CSI-RS antenna port number and CSI-RS first port location information;
4) location information parameter entrained by is positional information index, and positional information index is sent to subscriber equipment by base station, and described subscriber equipment carries out tabling look-up according to positional information index and antenna port number and obtains corresponding positional information; The position table containing antenna port number, positional information and positional information index preserved by described base station and subscriber equipment; The described position table containing antenna port number, positional information and positional information index adopts the positional information of channel status instruction reference signal CSI-RS first antenna port and the position table of CSI-RS antenna port number absolute coding.
2. the method for claim 1, is characterized in that,
When the positional information of described channel status instruction reference signal adopts and informs subscriber equipment according to the recessive manner of cell ID and aerial information DR position information, subscriber equipment is at the physical label that afterwards obtain community synchronous with Serving cell, the aerial information of community is obtained after receiving the SIBx information of community, wherein, x=1 or 2, again according to the physical label of described community and the aerial information of community, subscriber equipment obtains index and the interior index of group between the group in described positional information according to the following equation:
Wherein, InterGroupIndex is index between group, and IntraGroupIndex is index in group,
for the physical label of community, AntNum is the number of antennas of community, and MultiFactor is the minimum multiplexing factor of community.
3. the method for claim 1, is characterized in that,
When adopting signaling to carry the dominant mode of location information parameter, in described group, index is undertaken notifying by the aerial information of channel status instruction reference signal and the combined coding of channel status instruction reference signal port 0 position; Concrete indexical relation is as shown in the table:
Subscriber equipment receives the configuration index J of CSI-RS from base station
cSIR Safter, reference signal port 0 position of the CSI-RS pattern under acquisition 8 antenna of tabling look-up according to the port number in aerial information, i.e. index in acquisition group.
4. the method for claim 1, is characterized in that,
When the positional information of described channel status instruction reference signal adopts the mode of described recessive manner and dominant mode combination to inform subscriber equipment, base station adopts signaling to carry the dominant mode of location information parameter, and index between group is sent to subscriber equipment; Subscriber equipment, according to the aerial information obtaining community when the mark obtaining community afterwards synchronous with Serving cell and the SIBx information receiving community, calculates index, wherein x=1 or 2 in acquisition group;
Between described group, index is the index information of each resource group distributing to channel status instruction reference signal, is used to indicate each resource group;
In described group, index is the index information of each Resource Block in each resource group, is used to indicate each Resource Block, the corresponding resource element RE couple of each Resource Block described.
5. the method for claim 1, it is characterized in that, the described position table containing positional information and positional information index is when adopting the position of the combined coding of channel status instruction reference signal CSI-RS antenna port number and CSI-RS first port location information to show, under normal cyclic prefix, the position table of the combined coding of described employing channel status instruction reference signal CSI-RS antenna port number and CSI-RS first port location information is as shown in the table:
Wherein, frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD, and k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, value is first time slot in 0 expression subframe, value represents second time slot in a subframe when being 1, in above-mentioned table, location index 0 ~ 19,35 ~ 46 correspond to 2 antenna configurations, 20 ~ 29,47 ~ 52 correspond to 4 antenna configurations, 30 ~ 34, and 53 ~ 55 correspond to 8 antenna configurations.
6. the method for claim 1, it is characterized in that, the described position table containing positional information and positional information index is when adopting the position of the combined coding of channel status instruction reference signal CSI-RS antenna port number and CSI-RS first port location information to show, under extended cyclic prefix, the position table of the combined coding of described employing channel status instruction reference signal CSI-RS antenna port number and CSI-RS first port location information is as shown in the table:
Wherein, frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD, and k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe, wherein when value is 1,0 ~ 15,28 ~ 39 is 2 antenna configurations, 16 ~ 23,40 ~ 45 is 4 antenna configurations, and 24 ~ 27,46 ~ 48 is 8 antenna configurations.
7. the method for claim 1, is characterized in that, under normal cyclic prefix, the positional information of described employing channel status instruction reference signal CSI-RS first antenna port and the position of CSI-RS antenna port number absolute coding are shown as shown in the table:
Wherein, frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD, and k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe when value is 1, and 2 in CSI-RS configuration information, 4,8 represents corresponding antenna port number respectively.
8. the method for claim 1, is characterized in that, under extended cyclic prefix, the positional information of described employing channel status instruction reference signal CSI-RS first antenna port and the position of CSI-RS antenna port number absolute coding are shown as shown in the table:
Wherein, frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD, and k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe when value is 1, and 2 in CSI-RS configuration information, 4,8 represents corresponding antenna port number respectively.
9. the method for claim 1, is characterized in that, under normal cyclic prefix, the positional information of described employing channel status instruction reference signal CSI-RS first antenna port and the position of CSI-RS antenna port number absolute coding are shown as shown in the table:
Wherein, frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD, and k ' refers to the frequency domain position index of first CSI-RS port, and l ' is the index of the initial OFDM symbol of first CSI-RS port, n
sthe time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe when value is 1, and 2 in CSI-RS configuration information, 4,8 represents corresponding antenna port number respectively.
10. the method for claim 1, it is characterized in that, under extended cyclic prefix, the positional information of described employing channel status instruction reference signal CSI-RS first antenna port and the position of CSI-RS antenna port number absolute coding are shown as shown in the table:
Wherein, frame structure Class1 and 2 refers to the pattern that TDD and FDD combines, and only frame structure 2 refers to the pattern under TDD, k ' refers to the frequency domain position index of first CSI-RS port, l ' is the index of the initial OFDM symbol of first CSI-RS port, and ns is the time sequence index in radio frames, n
smod2 represents the time slot index in a subframe, and value is first time slot in 0 expression subframe, represents second time slot in a subframe when value is 1, and 2 in CSI-RS configuration information, 4,8 represents corresponding antenna port number respectively.
11. 1 kinds of mobile communication system, comprise base station and subscriber equipment, wherein,
Described base station, for channel status being indicated the configuration information notifying user equipment of reference signal, the configuration information of described channel status instruction reference signal comprises cycle and sub-frame offset, also comprises the positional information of channel status instruction reference signal; Wherein, the positional information of described channel status instruction reference signal adopts the recessive manner according to cell ID and aerial information DR position information, or adopt signaling to carry the dominant mode of location information parameter, or the mode adopting described recessive manner and dominant mode to combine inform subscriber equipment;
Described subscriber equipment, sends mode corresponding to positional information mode with base station and receives for adopting the positional information that described channel status indicates reference signal;
Described location information parameter can indicate one of in such a way:
1) location information parameter comprises index and the interior index of group between group;
Between described group, index is the index information of each resource group distributing to channel status instruction reference signal, is used to indicate each resource group;
The minimum multiplexing factor of the maximum Zu Shuowei community of resource group;
Or maximum group of number of resource group is corresponding with maximum multiplexing factor during 8 antenna, wherein:
The maximum group number corresponding for multiplexing factor maximum under frequency division duplex system normal cyclic prefix is 5;
The maximum group number corresponding for multiplexing factor maximum under frequency division duplex system extended cyclic prefix is 4;
The maximum group number corresponding for multiplexing factor maximum under tdd systems normal cyclic prefix is 8;
The maximum group number corresponding for multiplexing factor maximum under tdd systems extended cyclic prefix is 7;
In described group, index is the index information of each Resource Block in each resource group, is used to indicate each Resource Block, the corresponding resource element RE couple of each Resource Block described;
2) location information parameter entrained by is positional information index, and positional information index is sent to subscriber equipment by base station, and described subscriber equipment is undertaken tabling look-up by positional information index and obtains corresponding positional information; The position table containing positional information and positional information index preserved by described base station and subscriber equipment;
The described position table containing positional information and positional information index is as shown in the table:
Wherein, I
cSI-RSfor the positional information index of CSI-RS, AntPortNum is the antenna port number of community, and Location is the position of community in Resource Block;
3) the described position table containing positional information and positional information index is the position table adopting channel status to indicate the combined coding of reference signal CSI-RS antenna port number and CSI-RS first port location information;
4) location information parameter entrained by is positional information index, and positional information index is sent to subscriber equipment by base station, and described subscriber equipment carries out tabling look-up according to positional information index and antenna port number and obtains corresponding positional information; The position table containing antenna port number, positional information and positional information index preserved by described base station and subscriber equipment; The described position table containing antenna port number, positional information and positional information index adopts the positional information of channel status instruction reference signal CSI-RS first antenna port and the position table of CSI-RS antenna port number absolute coding.
12. mobile communication system as claimed in claim 11, is characterized in that,
When the positional information of described channel status instruction reference signal adopts and informs to subscriber equipment according to the recessive manner of cell ID and aerial information DR position information by described base station,
Described subscriber equipment is at the physical label that afterwards obtain community synchronous with Serving cell, the aerial information of community is obtained when receiving the SIBx information of community, wherein, x=1 or 2, according to the physical label of described community and the aerial information of community, subscriber equipment obtains index and the interior index of group between the group in described positional information according to the following equation:
Wherein, InterGroupIndex is index between group, and IntraGroupIndex is index in group,
for the physical label of community, AntNum is the number of antennas of community, and MultiFactor is the minimum multiplexing factor of community.
13. mobile communication system as claimed in claim 11, is characterized in that, the position table containing positional information and positional information index preserved by described base station and subscriber equipment;
When the dominant mode that the positional information of described channel status instruction reference signal adopts signaling to carry location information parameter is informed to subscriber equipment by described base station, entrained location information parameter is positional information index, positional information index is sent to subscriber equipment by base station, and described subscriber equipment is undertaken tabling look-up by positional information index and obtains corresponding positional information.
14. mobile communication system as claimed in claim 11, it is characterized in that, the described position table containing positional information and positional information index adopts the position of the combined coding of channel status instruction reference signal CSI-RS antenna port number and CSI-RS first port location information to show, or adopt the positional information of channel status instruction reference signal CSI-RS first antenna port and the position table of CSI-RS antenna port number absolute coding.
15. mobile communication system as claimed in claim 11, is characterized in that,
When the dominant mode that the positional information of described channel status instruction reference signal adopts signaling to carry location information parameter is informed to subscriber equipment by described base station, entrained location information parameter is index and the interior index of group between group.
16. mobile communication system as claimed in claim 11, is characterized in that,
When the mode that the positional information of described channel status instruction reference signal adopts described recessive manner and dominant mode to combine is informed to subscriber equipment by described base station, base station adopts signaling to carry the dominant mode of location information parameter, and index between group is sent to subscriber equipment;
Described subscriber equipment, according to the aerial information obtaining community when the mark obtaining community afterwards synchronous with Serving cell and the SIBx information receiving community, calculates index in acquisition group, wherein, and x=1 or 2.
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| PCT/CN2011/001645 WO2012041016A2 (en) | 2010-09-29 | 2011-09-28 | Mobile communication system and configuration method for channel state indication - reference signal thereof |
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